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#-h- lex 543 local 12/01/80 15:54:12
# lex - return lexical type of token
include defs
integer function lex (lexstr)
character lexstr (MAXTOK)
include COMMON_BLOCKS
character gnbtok, t, c
integer lookup, n
string sdefault "default"
for (lex = gnbtok (lexstr, MAXTOK); lex == NEWLINE;
lex = gnbtok (lexstr, MAXTOK))
;
if (lex == EOF | lex == SEMICOL | lex == LBRACE | lex == RBRACE)
return
if (lex == DIGIT)
lex = LEXDIGITS
else if (lex == TOGGLE)
lex = LEXLITERAL
else if (lex == XPP_DIRECTIVE)
lex = LEXDECL
else if (lookup (lexstr, lex, rkwtbl) == YES) {
if (lex == LEXDEFAULT) { # "default:"
n = -1
repeat {
c = ngetch (c)
n = n + 1
} until (c != BLANK & c != TAB)
call putbak (c)
t = gnbtok (lexstr, MAXTOK)
call pbstr (lexstr)
if (n > 0)
call putbak (BLANK)
call scopy (sdefault, 1, lexstr, 1)
if (t != COLON)
lex = LEXOTHER
}
}
else
lex = LEXOTHER
return
end
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